EP0758787A1 - Electrolyte solution for driving electrolytic capacitor and electrolytic capacitor made therewith - Google Patents
Electrolyte solution for driving electrolytic capacitor and electrolytic capacitor made therewith Download PDFInfo
- Publication number
- EP0758787A1 EP0758787A1 EP96904278A EP96904278A EP0758787A1 EP 0758787 A1 EP0758787 A1 EP 0758787A1 EP 96904278 A EP96904278 A EP 96904278A EP 96904278 A EP96904278 A EP 96904278A EP 0758787 A1 EP0758787 A1 EP 0758787A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrolytic capacitor
- electrolyte
- polyethylene glycol
- formulas
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/02—Diaphragms; Separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
Definitions
- the present invention relates to an electrolyte for driving electrolytic capacitor used in an aluminum electrolytic capacitor, and an electrolytic capacitor using the same.
- an electrolyte for driving an electrolytic capacitor used in an aluminum electrolytic capacitor is known to be an electrolyte for driving electrolytic capacitor using an organic compound such as gamma-butyrolactone or ethylene glycol as main solvent in which solutes are dissolved, such as boric acid, other inorganic acid, adipic acid, azelaic acid, butyl octane diacid (Japanese Patent Publication 60-13293), 5,6-decane dicarboxylic acid (Japanese Patent Publication 63-15738), dibasic acid having side chain (Japanese Laid-open Patent 1-45539), other dibasic acid, and their salts.
- an organic compound such as gamma-butyrolactone or ethylene glycol
- solutes such as boric acid, other inorganic acid, adipic acid, azelaic acid, butyl octane diacid
- Japanese Patent Publication 60-13293 Japanese Patent Publication 60
- Such compounds have the advantage of increasing the effect of heightening the spark generation voltage as the amount of addition and molecular weight are larger, but solubility in organic solvent, especially at low temperature, is lowered, and precipitation occurs, there arises a limit for selection of amount of addition and molecular weight. It is better to use these compounds at molecular weight of 1000 or less for the sake of precipitation at low temperature. In such range of molecular weight, however, it is not enough to raise the spark generation voltage, and there is a contradictory problem of inducing short puncture at the time of product aging.
- precipitation at low temperature may be prevented by adding sufficient water to the electrolyte for driving electrolytic capacitor.
- the electrolyte for driving electrolytic capacitor with sufficient addition of water the vapor pressure in the aluminum electrolytic capacitor is raised due to the effect of water, and it is hard to use at 100°C or higher temperature.
- the invention is intended to solve the problems of the prior art, and it is hence a primary object thereof to present an electrolyte for driving electrolytic capacitor capable of sufficiently heightening the spark generation voltage and chemical conversion character of formed oxidation film, not precipitating even at low temperature, and an electrolytic capacitor using the same.
- Fig. 1 is a characteristic diagram showing chemical conversion factor of formed oxide film of an electrolyte for driving electrolytic capacitor in an embodiment of the invention and an electrolyte for driving electrolytic capacitor in prior art
- Fig. 2 is a perspective view showing an element portion of an aluminum electrolytic capacitor.
- the invention relates to an electrolyte for driving electrolytic capacitor prepared by using a solvent mainly composed of organic compound, and dissolving one or more solutes selected from the group consisting of inorganic acids and organic acids, more specifically adding and dissolving at least one of copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2), or both of the copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) simultaneously, and an electrolytic capacitor using the same.
- compositions of the electrolyte for driving electrolytic capacitor and characteristics of embodiments 1 to 20 of the invention and prior arts 1 to 7 are summarized in Table 2, Table 3, and Table 4.
- Table 2 Table 3
- Table 4 Table 4
- the characteristic diagram showing the chemical conversion factor of formed oxidation film of prior arts 6 and 7 and embodiment 20 of the invention are given in Fig. 1.
- the water content in the electrolyte for driving electrolytic capacitor was commonly adjusted at 1.5% in embodiments 1 to 20 of the invention and prior arts 1 to 7.
- the spark generation voltage can be raised while maintaining the conductivity, so that the dielectric strength can be stabilized without raising the resistance of the aluminum electrolytic capacitor.
- Table 5 shows results of life test of aluminum electrolytic capacitors by preparing 20 samples each of aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in prior arts 2 and 3 and aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in embodiments 2, 3 and 4 shown in Table 2 and Table 3.
- the rating of all aluminum electrolytic capacitors was 250 WV 670 ⁇ F, and the test temperature was 110°C.
- Fig. 2 shows the composition of the element portion of the aluminum electrolytic capacitor, and as shown in Fig. 2, the element is composed by taking up an anode foil 1 as a positive electrode made of aluminum, and a cathode foil 2 as negative electrode made of also aluminum oppositely through an interposed separator 3. An outgoing lead 4 is connected to the anode foil 1 and cathode foil 2 of this element.
- Table 6 shows results of life test of aluminum electrolytic capacitors, by preparing 20 samples each of aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in prior art 6 and aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in embodiment 20 shown in Table 2 and Table 4.
- the rating of all aluminum electrolytic capacitors was 450 WV 330 ⁇ F, and the test temperature was 110°C.
- the solvent of these embodiments of the invention described so far is ethylene glycol, but it was confirmed that similar effects were obtained by selecting, instead, at least one type of glycol ethers such as ethylene glycol monomethyl ether, acid amids such as dimethyl formamide, and cyclic esters such as gamma-butyrolactone.
- glycol ethers such as ethylene glycol monomethyl ether, acid amids such as dimethyl formamide, and cyclic esters such as gamma-butyrolactone.
- Table 7 shows embodiment 21 of the invention using gamma-butyrolactone as solvent and prior art 8 as comparative example.
- the spark generation voltage can be sufficiently heightened.
- the structure of the copolymer of polyethylene glycol and polypropylene glycol is similar in performance whether in block copolymer or in random copolymer, and similar effects are expected.
- At least one or more of copolymers of polyethylene glycol and polypropylene glycol, or both of copolymers of polyethylene glycol and polypropylene glycols shown in formulas (1) and (2) may be added and dissolved simultaneously.
- the molecular weight of the copolymer of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) is preferably in a range of 1000 to 20000 as clear from the embodiments of the invention, and the amount of addition of the copolymer of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) is preferably in a range of 0.1 to 10 wt.% as clear from the embodiments of the invention.
- the copolymer used in the electrolyte for driving the electrolytic capacitor of the invention is prepared by copolymerizing polyethylene glycol of which defect is high crystallinity, and polypropylene glycol low in solubility in organic solvent but low in degree of crystallization, mutual defects are compensated for each other, so that the problem of precipitation at low temperature can be solved.
- the range of selection of usable amount of addition and molecular weight is broadened, and the spark generation voltage and chemical conversion factor of formed oxidation film can be enhanced, so that the reliability of the aluminum electrolytic capacitor from low voltage to medium and high voltage can be enhanced.
Abstract
HO - (C2H4O)n - (C3H6O)m - (C2H4O)n - H (1)
(n and m are arbitrary natural numbers.)
HO - [(C2H4O)n - (C3H6O)m]l - H (2)
(n, m, and l are arbitrary natural numbers.)
Description
- The present invention relates to an electrolyte for driving electrolytic capacitor used in an aluminum electrolytic capacitor, and an electrolytic capacitor using the same.
- Generally, an electrolyte for driving an electrolytic capacitor used in an aluminum electrolytic capacitor is known to be an electrolyte for driving electrolytic capacitor using an organic compound such as gamma-butyrolactone or ethylene glycol as main solvent in which solutes are dissolved, such as boric acid, other inorganic acid, adipic acid, azelaic acid, butyl octane diacid (Japanese Patent Publication 60-13293), 5,6-decane dicarboxylic acid (Japanese Patent Publication 63-15738), dibasic acid having side chain (Japanese Laid-open Patent 1-45539), other dibasic acid, and their salts.
- In such electrolytes for driving electrolytic capacitor, since the spark generation voltage and chemical conversion factor are not enough, and when used in an electrolytic capacitor, it may cause troubles such as short puncture due to aging. It has been therefore attempted to solve the problems by adding polyethylene glycol (Japanese Patent Publication 3-76776) or polyglycerin (Japanese Laid-open Patent 2-194611), thereby enhancing the spark generation voltage.
- Such compounds have the advantage of increasing the effect of heightening the spark generation voltage as the amount of addition and molecular weight are larger, but solubility in organic solvent, especially at low temperature, is lowered, and precipitation occurs, there arises a limit for selection of amount of addition and molecular weight. It is better to use these compounds at molecular weight of 1000 or less for the sake of precipitation at low temperature. In such range of molecular weight, however, it is not enough to raise the spark generation voltage, and there is a contradictory problem of inducing short puncture at the time of product aging.
- Or, when such compounds are composed so as to increase in the amount of addition and molecular weight, precipitation at low temperature may be prevented by adding sufficient water to the electrolyte for driving electrolytic capacitor. In the electrolyte for driving electrolytic capacitor with sufficient addition of water, however, the vapor pressure in the aluminum electrolytic capacitor is raised due to the effect of water, and it is hard to use at 100°C or higher temperature.
- These compounds are more likely to crystallize as the molecular weight increases, and if solidified in wax form, it causes a serious difficulty in working efficiency in mass production.
- The invention is intended to solve the problems of the prior art, and it is hence a primary object thereof to present an electrolyte for driving electrolytic capacitor capable of sufficiently heightening the spark generation voltage and chemical conversion character of formed oxidation film, not precipitating even at low temperature, and an electrolytic capacitor using the same.
- Fig. 1 is a characteristic diagram showing chemical conversion factor of formed oxide film of an electrolyte for driving electrolytic capacitor in an embodiment of the invention and an electrolyte for driving electrolytic capacitor in prior art, and Fig. 2 is a perspective view showing an element portion of an aluminum electrolytic capacitor.
- The invention relates to an electrolyte for driving electrolytic capacitor prepared by using a solvent mainly composed of organic compound, and dissolving one or more solutes selected from the group consisting of inorganic acids and organic acids, more specifically adding and dissolving at least one of copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2), or both of the copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) simultaneously, and an electrolytic capacitor using the same.
HO - (C2H4O)n - (C3H6O)m - (C2H4O)n - H (1)
(n and m are arbitrary natural numbers.)
HO - [(C2H4O)n - (C3H6O)m]l - H (2)
(n, m, and l are arbitrary natural numbers.) - Embodiments of the invention are described below. First, concerning precipitation at low temperature, results of measurements of an embodiment of the invention and prior art are shown in Table 1.
Table 1 Composition After 3 hrs at -15°C Prior art Ethylene glycol 85 Polyethylene glycol #4000 10 Precipitated Ammonium adipate 5 Embodiment Ethylene glycol 85 Polyethylene glycol: polypropylene glycol =5 : 5 #4000 10 Not precipitated Ammonium adipate 5 - As clear from Table 1, in the electrolyte for driving electrolytic capacitor in the embodiment of the invention, no precipitation was observed after 3 hours at -15°C. Only an example of using adipic acid is shown in Table 1, but when other organic acids or inorganic acids were used, same results as in the embodiment of the invention were obtained. Therefore, the low temperature precipitation property of the invention is known to be excellent regardless of the type of the selected solutes.
- Compositions of the electrolyte for driving electrolytic capacitor and characteristics of
embodiments 1 to 20 of the invention andprior arts 1 to 7 are summarized in Table 2, Table 3, and Table 4. Incidentally, the characteristic diagram showing the chemical conversion factor of formed oxidation film ofprior arts embodiment 20 of the invention are given in Fig. 1. The water content in the electrolyte for driving electrolytic capacitor was commonly adjusted at 1.5% inembodiments 1 to 20 of the invention andprior arts 1 to 7.Table 2 Composition (wt%) Conductivity (mS/cm) Spark generation voltage (V) Prior art 1Ethylene glycol 85 0.5 550 Ammonium borate 15 Prior art 2Ethylene glycol 90 2.8 320 Diammonium azelate 10 Prior art 3Ethylene glycol 90 3.2 280 Ammonium benzoate 10 Prior art 4Ethylene glycol 90 3.5 300 Diammonium adipate 10 Prior art 5 Ethylene glycol 90 5,6-Decane dicarboxylic acid diammonium 10 2.0 420 Prior art 6Ethylene glycol 90 1,7-Octane dicarboxylic acid diammonium 10 2.0 420 Prior art 7Ethylene glycol 80 Polyglycerin #1000 10 1.5 460 1,7-Octane dicarboxylic acid diammonium 10 - As clear from Table 2, Table 3 and Table 4, in the embodiments of the invention, when the solutes are same as in the prior arts, the spark generation voltage can be enhanced notably. As a result, the incidence of short puncture in aging process can be lowered. Still more, the electrolyte for driving electrolytic capacitor adding copolymers of polyethylene glycol and polypropylene glycol of the invention can dramatically enhance the chemical conversion factor of the formed oxidation film, as well as the spark generation voltage, as understood from Fig. 1.
- Moreover, as known from embodiments 18 to 20 of the invention in Table 2, by adjusting the amount of addition, the spark generation voltage can be raised while maintaining the conductivity, so that the dielectric strength can be stabilized without raising the resistance of the aluminum electrolytic capacitor.
- Table 5 shows results of life test of aluminum electrolytic capacitors by preparing 20 samples each of aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in
prior arts embodiments - Fig. 2 shows the composition of the element portion of the aluminum electrolytic capacitor, and as shown in Fig. 2, the element is composed by taking up an
anode foil 1 as a positive electrode made of aluminum, and acathode foil 2 as negative electrode made of also aluminum oppositely through an interposedseparator 3. Anoutgoing lead 4 is connected to theanode foil 1 andcathode foil 2 of this element. - The element in such composition is impregnated with a driving electrolyte, and the element is sealed in a case such as an aluminum case, so that an aluminum electrolytic capacitor is composed.
Table 5 Initial characteristic After 2000 hrs at 110°C Remarks tan δ (%) LC(µA) ΔC% tan δ (%) LC(µA) Prior art 26.0 32.5 -6.8 15.0 43.2 Open valve trouble in 3/20 samples Prior art 35.1 65.3 Test discontinued Short puncture in 15/20 samples Embodiment 2 5.7 21.5 0 6.5 10.1 No problem Embodiment 3 5.7 25.1 0 6.5 9.7 No problem Embodiment 4 5.7 20.3 0 6.5 9.5 No problem - As clear from Table 5, in the aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in
prior art 2, open valve troubles occurred in 3 out of 20 samples during life test. Inprior art 3, short puncture occurring in 15 out of 20 samples during aging, and the life test could not be continued. By contrast, in the aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor inembodiments - Moreover, results of evaluation in 450 WV class are shown in Table 6. Table 6 shows results of life test of aluminum electrolytic capacitors, by preparing 20 samples each of aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in
prior art 6 and aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor inembodiment 20 shown in Table 2 and Table 4. The rating of all aluminum electrolytic capacitors was 450 WV 330 µF, and the test temperature was 110°C.Table 6 Initial characteristic After 2000 hrs at 110°C Remarks tan δ (%) LC(µA) ΔC% tan δ (%) LC(µA) Prior art 63.1 28.4 Test discontinued Short puncture in 10/20 samples Embodiment 20 3.8 20.5 0 5.1 9.5 No problem - As clear from Table 6, in the aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor in
prior art 6, short puncture occurring in 10 out of 20 samples during aging. By contrast, in the aluminum electrolytic capacitors using the electrolyte for driving electrolytic capacitor inembodiment 20 of the invention, short puncture did not occur during aging or throughout the life test, and the characteristics in 2000 hours at 110°C of life test, as compared with the initial characteristics, were small in change rate of electrostatic capacity (ΔC), small in increase of tangent of loss angle ( - The solvent of these embodiments of the invention described so far is ethylene glycol, but it was confirmed that similar effects were obtained by selecting, instead, at least one type of glycol ethers such as ethylene glycol monomethyl ether, acid amids such as dimethyl formamide, and cyclic esters such as gamma-butyrolactone. As an example, Table 7 shows embodiment 21 of the invention using gamma-butyrolactone as solvent and prior art 8 as comparative example.
Table 7 Composition (wt%) Conductivity (mS/cm) Spark generation voltage (V) Prior art 8 Gamma-butyrolactone 80 Phthalic acid 10 3.50 100 Triethylamine 3 Embodiment 21 Ethylene glycol 80 Polyethylene glycol: polypropylene glycol = 5:5 #2000 2 3.50 150 Phthalic acid 10 Triethylamine 3 - As clear from Table 7, even in a different solvent system, the spark generation voltage can be sufficiently heightened.
- Incidentally, as shown in formulas (1) and (2), the structure of the copolymer of polyethylene glycol and polypropylene glycol is similar in performance whether in block copolymer or in random copolymer, and similar effects are expected.
- When adding and dissolving the copolymer of polyethylene glycol and polypropylene glycol in formulas (1) and (2) in an electrolyte for driving electrolytic capacitor, at least one or more of copolymers of polyethylene glycol and polypropylene glycol, or both of copolymers of polyethylene glycol and polypropylene glycols shown in formulas (1) and (2) may be added and dissolved simultaneously.
- The molecular weight of the copolymer of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) is preferably in a range of 1000 to 20000 as clear from the embodiments of the invention, and the amount of addition of the copolymer of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) is preferably in a range of 0.1 to 10 wt.% as clear from the embodiments of the invention.
- As obvious from the description herein, since the copolymer used in the electrolyte for driving the electrolytic capacitor of the invention is prepared by copolymerizing polyethylene glycol of which defect is high crystallinity, and polypropylene glycol low in solubility in organic solvent but low in degree of crystallization, mutual defects are compensated for each other, so that the problem of precipitation at low temperature can be solved. By solving this problem, the range of selection of usable amount of addition and molecular weight is broadened, and the spark generation voltage and chemical conversion factor of formed oxidation film can be enhanced, so that the reliability of the aluminum electrolytic capacitor from low voltage to medium and high voltage can be enhanced.
Claims (4)
- An electrolyte for driving electrolytic capacitor prepared by using a solvent mainly composed of organic compound, and dissolving one or more solutes selected from the group consisting of inorganic acids and organic acids, more specifically adding and dissolving at least one of copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2), or both of the copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) simultaneously.
HO - (C2H4O)n - (C3H6O)m - (C2H4O)n - H (1)
(n and m are arbitrary natural numbers.)
HO - [(C2H4O)n - (C3H6O)m]l -H (2)
(n, m, and l are arbitrary natural numbers.) - An electrolyte for driving electrolytic capacitor of claim 1, wherein the molecular weight of the copolymer of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) ranges from 1000 to 20000.
- An electrolyte for driving electrolytic capacitor of claim 1, wherein the amount of addition of the copolymer of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) ranges from 0.1 to 10 wt.%.
- An electrolytic capacitor using an electrolyte for driving electrolytic capacitor prepared by using a solvent mainly composed of organic compound, and dissolving one or more solutes selected from the group consisting of inorganic acids and organic acids, more specifically adding and dissolving at least one of copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2), or both of the copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) simultaneously.
HO - (C2H4O)n - (C3H6O)m - (C2H4O)n - H (1)
(n and m are arbitrary natural numbers.)
HO - [(C2H4O)n - (C3H6O)m]l - H (2)
(n, m, and l are arbitrary natural numbers. )
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP42892/95 | 1995-03-02 | ||
JP04289295A JP3538251B2 (en) | 1995-03-02 | 1995-03-02 | Electrolyte for driving electrolytic capacitors |
PCT/JP1996/000473 WO1996027201A1 (en) | 1995-03-02 | 1996-02-29 | Electrolyte solution for driving electrolytic capacitor and electrolytic capacitor made therewith |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0758787A1 true EP0758787A1 (en) | 1997-02-19 |
EP0758787A4 EP0758787A4 (en) | 2005-10-12 |
EP0758787B1 EP0758787B1 (en) | 2006-10-11 |
Family
ID=12648692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96904278A Expired - Lifetime EP0758787B1 (en) | 1995-03-02 | 1996-02-29 | Electrolyte solution for driving electrolytic capacitor and electrolytic capacitor made therewith |
Country Status (7)
Country | Link |
---|---|
US (1) | US5776358A (en) |
EP (1) | EP0758787B1 (en) |
JP (1) | JP3538251B2 (en) |
KR (1) | KR100304163B1 (en) |
CN (1) | CN1134801C (en) |
DE (1) | DE69636615T2 (en) |
WO (1) | WO1996027201A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3551035B2 (en) * | 1998-08-31 | 2004-08-04 | 松下電器産業株式会社 | Electrolytic solution for driving electrolytic capacitor and electrolytic capacitor using the same |
JP2004311482A (en) * | 2003-04-02 | 2004-11-04 | Sanyo Chem Ind Ltd | Electrolytic solution for electrolytic capacitor |
JP4379156B2 (en) | 2004-03-03 | 2009-12-09 | パナソニック株式会社 | Aluminum electrolytic capacitor |
JP5810292B2 (en) * | 2010-02-15 | 2015-11-11 | パナソニックIpマネジメント株式会社 | Electrolytic capacitor |
JP6442162B2 (en) * | 2014-05-22 | 2018-12-19 | サン電子工業株式会社 | Electrolytic capacitor |
CN108666616A (en) * | 2017-03-31 | 2018-10-16 | 比亚迪股份有限公司 | A kind of lithium-ion battery electrolytes and battery |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02312218A (en) * | 1989-05-26 | 1990-12-27 | Nichicon Corp | Electrolyte for driving of electrolytic capacitor |
JPH0374827A (en) * | 1989-08-16 | 1991-03-29 | Matsushita Electric Ind Co Ltd | Electrolyte for driving electrolytic capacitor |
EP0591810A1 (en) * | 1992-09-29 | 1994-04-13 | Matsushita Electric Industrial Co., Ltd. | Electrolyte for use in an electrolytic capacitor and the electrolytic capacitor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69016239T2 (en) * | 1989-04-04 | 1995-05-24 | Matsushita Electric Ind Co Ltd | Electrolyte for electrolytic capacitors and capacitor containing them. |
-
1995
- 1995-03-02 JP JP04289295A patent/JP3538251B2/en not_active Expired - Fee Related
-
1996
- 1996-02-29 DE DE69636615T patent/DE69636615T2/en not_active Expired - Fee Related
- 1996-02-29 CN CNB961901470A patent/CN1134801C/en not_active Expired - Fee Related
- 1996-02-29 WO PCT/JP1996/000473 patent/WO1996027201A1/en active IP Right Grant
- 1996-02-29 EP EP96904278A patent/EP0758787B1/en not_active Expired - Lifetime
- 1996-02-29 US US08/732,372 patent/US5776358A/en not_active Expired - Lifetime
- 1996-02-29 KR KR1019960706162A patent/KR100304163B1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02312218A (en) * | 1989-05-26 | 1990-12-27 | Nichicon Corp | Electrolyte for driving of electrolytic capacitor |
JPH0374827A (en) * | 1989-08-16 | 1991-03-29 | Matsushita Electric Ind Co Ltd | Electrolyte for driving electrolytic capacitor |
EP0591810A1 (en) * | 1992-09-29 | 1994-04-13 | Matsushita Electric Industrial Co., Ltd. | Electrolyte for use in an electrolytic capacitor and the electrolytic capacitor |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 106 (E-1044), 13 March 1991 (1991-03-13) -& JP 02 312218 A (NICHICON CORP), 27 December 1990 (1990-12-27) * |
PATENT ABSTRACTS OF JAPAN vol. 015, no. 240 (E-1079), 20 June 1991 (1991-06-20) -& JP 03 074827 A (MATSUSHITA ELECTRIC IND CO LTD), 29 March 1991 (1991-03-29) * |
See also references of WO9627201A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR970703037A (en) | 1997-06-10 |
EP0758787A4 (en) | 2005-10-12 |
CN1148442A (en) | 1997-04-23 |
CN1134801C (en) | 2004-01-14 |
JPH08241831A (en) | 1996-09-17 |
DE69636615T2 (en) | 2007-01-18 |
EP0758787B1 (en) | 2006-10-11 |
KR100304163B1 (en) | 2001-11-22 |
JP3538251B2 (en) | 2004-06-14 |
WO1996027201A1 (en) | 1996-09-06 |
DE69636615D1 (en) | 2006-11-23 |
US5776358A (en) | 1998-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7411777B2 (en) | Electrolytic solution for electric double layer capacitor and electric double layer capacitor | |
US6288889B1 (en) | Electrolytic solution for electrolytic capacitor and electrolytic capacitor using the same | |
US7004983B2 (en) | Polymer electrolyte composite for driving an electrolytic capacitor, an electrolytic capacitor using the same, and a method of making the electrolytic capacitor | |
KR100402997B1 (en) | Polymer Solid Electrolyte | |
EP1724795A1 (en) | Electrolytic solution for electric double layer capacitor and electric double layer capacitor | |
EP0758787A1 (en) | Electrolyte solution for driving electrolytic capacitor and electrolytic capacitor made therewith | |
EP0591810B1 (en) | Electrolyte for use in an electrolytic capacitor and the electrolytic capacitor | |
EP2555213B1 (en) | Electrolyte for electrolytic capacitor | |
KR20150065689A (en) | Electrolytic solution for electrolytic capacitor, and electrolytic capacitor | |
US20040214078A1 (en) | Electrochemical cell | |
KR100328262B1 (en) | A method for preparing electrolytes for aluminum electrolysis condensor for high voltage and the electrolyte prepared therefrom | |
JPH06208934A (en) | Electrolyte for driving electrolytic capacitor | |
JP3473288B2 (en) | Electrolytic solution for driving electrolytic capacitor and electrolytic capacitor using the same | |
KR20030034977A (en) | Electrolyte for aluminium electrolysis condenser of low voltage and electrolysis condenser having the same | |
JPH10106892A (en) | Electrolyte solution for driving electrolytic capacitor and electrolytic capacitor using the same | |
KR100348923B1 (en) | electrolyte for driving electrolytic condenser and electrolytic condenser using the same | |
JP2701876B2 (en) | Electrolyte for electrolytic capacitors | |
JP2003249421A (en) | Polymer electrolytic complex for electrolytic-capacitor driving, electrolytic capacitor using the same, and manufacturing method of the same | |
JP3991592B2 (en) | Electrolytic solution for electrolytic capacitor driving and electrolytic capacitor using the same | |
JP3684856B2 (en) | Electrolytic solution for electrolytic capacitor driving and electrolytic capacitor using the same | |
JPH0522374B2 (en) | ||
CN112837940A (en) | Conductive polymer mixed electrolytic capacitor | |
JPH05159978A (en) | Electrolyte solution for electrolytic-capacitor | |
JPH0810663B2 (en) | Electrolytic solution for electrolytic capacitors | |
JPH11186108A (en) | Aluminum electrolytic capacitor and electrolytic solution for driving it |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
17P | Request for examination filed |
Effective date: 19970212 |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20050830 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 69636615 Country of ref document: DE Date of ref document: 20061123 Kind code of ref document: P |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20070214 Year of fee payment: 12 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20070712 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20070209 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20080221 Year of fee payment: 13 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20080229 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20081031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090901 |